Smart contracts
Smart contracts help you exchange money, property, shares, or anything of value in a transparent, conflict-free way while avoiding the services of a middleman. #7
Terra0 #3, a blockchain based art project has shown a very interesting use of smart contracts to create a system where the forest and machines talk without human intervention.
Future of voting through smart contracts will mean interesting things for the institution of democracy all over the world.
In an imaginable future, it is possible that there will be many (crypto)currencies and people transacting in them can be present anywhere geographically. This will mean that political borders can become futile as far as economy is considered.
It is a concptually fascinating idea.